Here is one of my recent portraits of the Writer Larry Siedentop .
To retain the atmosphere of the room and the view out of the window I metered for the ambient light which balanced fairly well for the light outside the window around 1/60th sec f/8 at 800 asa . This gives the warm glow of the table lamp .
Then using an Elinchrom Ranger Quadra with 2 heads each with an umbrella I was able to get the light into Larry Siedentop’s face .
The key is to set the flash light to balance with the ambient light at f/8